DocumentCode :
3107640
Title :
A new single-inductor quadratic buck converter using average-current-mode control without slope-compensation
Author :
Chen, Jiann-Jong ; Hwang, Bo-Han ; Kung, Che-Min ; Tai, Wei-Yu ; Hwang, Yuh-Shyan
Author_Institution :
Dept. of Electron. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
fYear :
2010
fDate :
15-17 June 2010
Firstpage :
1082
Lastpage :
1087
Abstract :
A new single-inductor quadratic buck converter using average-current-mode control without slope-compensation is proposed in this paper. The average-current-mode technology minimizes several power-management problems, such as efficiency, EMI, size, transient response, design complexity, and cost. In DC/DC conversion applications that require a wide range of input and/or output voltages, conventional PWM buck converter topologies always operate at exceptionally low duty ratios, which limit the operation to the lower switching frequencies due to minimum ON-time of the transistor switch. The DC voltage conversion ratio of the proposed converter has a quadratic dependence on duty cycle, producing an extensive step-down; therefore, the high conversion ratio is achieved. This scheme employs an inner loop for current gain and an outer loop for PID-controller. The proposed buck converter only uses an inductor, two capacitors and single control circuit to achieve quadratic conversion ratio, therefore, an inductor and a control circuit is reduced. The advantages of the proposed quadratic buck converter are fast transient response, no use for slope-compensation, high-conversion-ratio, and an inductor reduction. The prototype of the proposed quadratic buck converter has been fabricated with TSMC 0.35μm 2P4M CMOS processes. The total chip area is 1.917 × 2.334 mm2.
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; electric current control; three-term control; CMOS; DC voltage conversion ratio; DC/DC conversion; PID-controller; PWM buck converter; average-current-mode control; power-management problem; single-inductor quadratic buck converter; size 0.35 micron; slope-compensation; switching frequency; transistor switch; Buck converters; Circuits; Costs; Electromagnetic interference; Inductors; Pulse width modulation; Pulse width modulation converters; Switches; Transient response; Voltage; average-current-mode control; buck converter; high-conversion-ratio; quadratic; slope-compensation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2010 the 5th IEEE Conference on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-5045-9
Electronic_ISBN :
978-1-4244-5046-6
Type :
conf
DOI :
10.1109/ICIEA.2010.5515818
Filename :
5515818
Link To Document :
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